Combined governor and speed-regulator.



F. G. HOBART & C. B.'JAHNKE. COMBINED GOVERNOR AND SPEED REGULATOR.

2 SHEETS-SHEET I.

AH E Patented Oct. 17, 1916.

APPLICATION FILED NOV. 29, 1915.

iza/672% FQJULZUU 6%6607) F. GKHOBART & C. B. JAHNK E. COMBINED GOVERNORAND SPEED REGULATOR.

APPLICATION FILED NOV. 29, 19l5'.

Patented Oct. 17,1916.

2 SHEETS-SHEET 2;

FRANKLIN Gr. HOBART AND CHARLES B. J'AHNKE, 0F BELOIT, WISCONSIN,ASSIGNORS T0 FAIRBANKS, MORSE & COMPANY, OF CHICAGO, ILLINOIS, ACORPORATION OF ILLINOIS.

mower.

COMBINED GOVERNOR AND SIPEED-REGULATOR.

Application filed November 29, 1915. Serial No. 63,920.

To all whom it may concern:

Be it known that we, FRANKLIN G. Ho- BART and CHARLES B. JAHNKE,citizens of the United States, residing at Beloit, in the county of Rockand State of Wisconsin, have invented a certain new and usefulImprovement Speed-Regulators, of which the following is a specification.

IOur invention relates to combined governor and speed regulator forinternal combustion engines.

The object of the invention is to provide means for holding an engine ofthis type to a predetermined speed, in combination with means forpredetermining or regulating the speed at which the engine is to run.

Contributing to this general object it is our purpose to render thedevice self contained, so that it may be preassembled and finallyattached as a Whole to the engine base.

We accomplish our object by the mechanism illustrated in theaccompanying drawings, in which Figure 1 is an elevation of a portion ofI an internal combustion engine showing the same equipped with mechanismwhich embodies our invention. Fig. 2 is a plan view of the parts shownin Fig. 1. Fig. 3 is an enlarged detail partly in horizontal sectionshowing the chief operating parts of the governor and regulator. Theline of section is indicated by the irregular line 3-3, Fig. 1. Fig.4 isadetail looking in the direct ion of the arrow at 4, Fig. 1. Fig. 5 isan elevation showing part of the head ,end of the cylinder. It alsoshows parts of the intake in section on the line 5-5, Fig. 1. Fig

6 is an end vieivlooking from the engine side showing the governor dragspring and associated parts. i

Similar numerals refer to similar parts throughout the several views.

The engine 1, of which a portion only is illustrated, is provided with,the usual inlet passage 2. Controlling this passage is a valve 3 securedto a stem 4, as best shown in Fig. 5. This valve is normally held openby a torsion spring 5. Rigidly fastened to the projecting stem 4 is anarm 6, which is connected by a rod 7 to the arm 8 of a bell in CombinedGovernors and.

crank lever which is pivoted upon the pin 9 mounted in the governorbracket. 10. This bracket is secured to the engine by bolts 11 or othersuitable fastening means. The other arm 12 of the bell crank is engagedby the projecting end of a spindle 13, which is mounted so as to freelyslide longitudinally 1n the governor body 14. The bracket 10 is boredout so as to receive said governor body and to permit the same to rotatefreely. Said governor body is longitudinally chambered and contains ahelical compression.

spring 15 which tends to move the spindle away from the arm 12. Thisspring at one end abuts an annular shoulder 13 on the spindle andat theother end abuts a threaded bushing 30 which screws into the outer end ofthe governor body. The bushing is notched at the outer end to take aspanner wrench and affords a simple and convenient method of adjustingthe tension Patented Oct. 17, ieio.

of the spring, and permitting its removal.

The governor body is driven by a pinion 16 which meshes with a gearwheel 17 secured preferably to the cam shaft (not shown) of the engine.By preference, the gears are so proportioned that the governor body willrotate at somewhat higher than engine speed. .The governor body has twoopposite and projecting arms 14? which abut one side of the governorbracket, while the pinion 16 which screws onto the end of the governorbody abuts the other end of the governor bracket, thus holding thegovernor body in position while it rotates, At the ends of the arms 14are .pins 20 which form pivots for the governor weights 21. Theseweights, witlrthe governor-body and associated parts, form what isfrequently termed a fly ball governor. Extending from each weight is anarm 22, the end of which engages the end of a collar 13 formed on thespindle 13. When the engine is at rest the compression spring 15 in thegovernor body acts upon the arms through the spindle and holds theweights'in contact move the spindle 13 ina direction to so operate thevalve 3 as to reduce the speed of the engine. a

The parts thus far described constitute a governor and hold the engineto the speed for which it is regulated. We will now describe the speedregulator by'which the engine may be set-to run at greater or slowerspeeds.

. eration, the spring presses against the hubs of the governor weights,thereby creating,

The spring 25, which is constructed preferably of fiat spring metal,bears against the end of a'projection 13* extending from the end of thespindle 13. The spring is rigidly secured to an arm 26 which is'pivotedupon the pin 27 carried by the governor bracket. An adjusting screw ismounted in said arm in such position that its inner end will abut theinner surface 10 of the governor bracket. The arrangement is such thatby :screwing the screw 28 down (toward the governor bracket) the spring25 will be caused to exert greater pressure upon the spindle 13, thussupplementing the action of the centrifugal force generated by thegovernor weights; hence, by screwing the ad-- ernor weights do notoccupy the entire length of the pivot pins 20 between the arms 14 butleave space for a spring 35, the ends of which are apertured to receivesaidpins and bear against one end of each of the hubs. This is a fiatsteel spring and is engaged at the middle by an adjusting screw 36screwing into the boss 37 formed upon one of the arms 14*. The tensionof the spring may be regulated by screwing the screw in or out. It isheld in its proper position by a lock nut 38. In opfriction andpreventing the governor from responding too suddenly to variations 1nthe engines speed and making the engine more steady in its action.

As a result of our invention, it is possible to set the engine for anydesired speed and maintain the engine at that speed. Furthermore, thisregulation in speed may be accomplished without shutting down theengine. The action will be smooth, for the governor drag spring pre entsthe weights from acting too suddenly or in response to too smallvariations in speed. The parts I are simple in form and comparativelyfew in number, and are durable and readily accessible; It will lin notedalsothat the device is self contained in the sense that the chiefoperating parts may be preassembled on a single supporting element (thebracket or frame 10) and the device as a whole subsequently bolted tothe engine base.

Having thus described our invention, what we claim as new and desire tosecure by Letters Patent, is

1. A centrifugal governor having two weights, a spring arranged tooppose the centrifugal action of said weights, and a friction dragspring arranged to have frictional contact against both weights. 2. Acentrifugal governor having a pivoted weight subject to the action ofcentrifugal force when the governor is in operation, a spring arrangedto oppose the centrifugal action of said weight, and a friction dragspring arranged to press against said weight in the direction of thepivotal axis thereof.

3. A centrifugal governor having a ro- 4. A centrifugal governor havinga rotat ing governor body, pinscarried by said governor body, governorweights pivotally supportedupon said pins, a drag spring pressing uponsaid weights in a direction parallel to the length of said pins, and anadjusting screw mounted in said governor body for regulating thepressure of said drag spring. 5. A self contained centrifugal governorfor engines, said governor havinga bracket constituting a frame on whichthe moving of the governor parts are supported, said moving partsincluding a plurality of weights, a spring arranged to oppose thecentrifugal actionof said weights, and a friction drag spring arrangedto have frictional contact against said weights.

6. A self contained centrifugal governor for engines, said governorhaving a bracket constituting a frame forming the sole support of themoving parts of the governor,

and said moving parts comprising two weights. a rotating governor bodyjournaled in sh,,:- .;bracket' and pivotally supporting said w s-ghts, aspring infsai d governor body arranged to oppose the centrifugal actionof said springs, means forregulating the ten sion of said spring, and afriction drag spring arrangedto have frictional contact against saidweights.

7. A centrifugal governor having a plurality of weights, a spring tooppose said weights, a single drag spring adapted to apply friction tosaid weights, all mounted on a common frame as a unit that may beseparately assembled and attached to the motor. m

8. A centrifugal governor having one or more Weights, a spring opposingthe action of said weights, a drag spring to apply friction to saidWeights, a speed regulator having'a spring adapted to augment or reducethe spring force opposed to said weights, all mounted on a Common frameas a unit that may be separately assembled and attached to "the motor.

scribed our names.

FRANKLIN G. HOBART. CHARLES B. J AHN KE,

Witnesses:

Enw. A. Comm, .GEO. B. INGERSOLL.

